We're dividing 644205 by 10 
We want to divide 644205 by 10.

Moving on to step 1:
The number 10 fits into 6 0 times, leaving a remainder of 6.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 6 after subtracting 0 from 6.
Fetch the next digit (4) from the dividend, attach it to 6 and continue: 64 / 10

Moving on to step 2:
64 divided by 10 is 6 with a remainder of 4.
The next digit of our result is 6. 
Result so far: 6.0
Deduct 60 from 64 and we're left with 4.
Include the next digit (4) from the dividend after 4, then repeat: 44 / 10

Moving on to step 3:
The number 10 fits into 44 4 times, leaving a remainder of 4.
The number 4 becomes the next digit in our result. 
Result so far: 64.0
If we take 40 away from 44, we end up with 4.
Grab the next digit (2) from the dividend, add it to 4, then carry on: 42 / 10

Step 4:
If we divide 42 by 10, we get 4 and a remainder of 2.
Write down 4 as next digit of the result. 
Result so far: 644.0
The remainder is 2 after subtracting 40 from 42.
Include the next digit (0) from the dividend after 2, then repeat: 20 / 10

Going ahead to step 5:
If we divide 20 by 10, we get 2 and a remainder of 0.
Use 2 as the next digit of our solution. 
Result so far: 6442.0
If we take 20 away from 20, we end up with 0.
Grab the next digit (5) from the dividend, add it to 0, then carry on: 5 / 10

Going ahead to step 6:
5 divided by 10 is 0 with a remainder of 5.
Record the quotient 0 as the next digit in the result. 
Result so far: 64420.0
Subtract 0 from 5 to get 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Moving on to step 7:
50 divided by 10 is 5 with a remainder of 0.
Write down 5 as next digit of the result. 
Result so far: 64420.5
Deduct 50 from 50 and we're left with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Moving on to step 8:
10 goes into 0 0 times with a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 64420.5
If we take 0 away from 0, we end up with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

On to step 9:
10 goes into 0 0 times with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 64420.5
If we take 0 away from 0, we end up with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

After the division, we end up with 64420.5 and a remainder of 0.0.